7257985 has 8 divisors (see below), whose sum is σ = 9953856. Its totient is φ = 4976880.

The previous prime is 7257947. The next prime is 7257989. The reversal of 7257985 is 5897527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7257985 - 2¹⁵ = 7225217 is a prime.

It is a Duffinian number.

7257985 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7257989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103651 + ... + 103720.

It is an arithmetic number, because the mean of its divisors is an integer number (1244232).

Almost surely, 2^7257985 is an apocalyptic number.

It is an amenable number.

7257985 is a deficient number, since it is larger than the sum of its proper divisors (2695871).

7257985 is a wasteful number, since it uses less digits than its factorization.

7257985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207383.

The product of its digits is 176400, while the sum is 43.

The square root of 7257985 is about 2694.0647727922. The cubic root of 7257985 is about 193.6148610186.

The spelling of 7257985 in words is "seven million, two hundred fifty-seven thousand, nine hundred eighty-five".